$_ENV=array(  'SYS'=>array(    'Memip'=>'127.0.0.1',      //MEMCACHE的ip    'Mempt'=>11211,       //MEMCACHE的port    'Memtim'=>10,          //MEMCACHE的超時時間  ));//托管SESSION到MEMCACHE,如果開啟失敗,則說明MEMCACHE沒有配置正確final class S{  public static function open(){  //禁止session自動開啟    session_write_close();  ini_set('session.auto_start',0);  //使用五十分之一的概率啟動gc清理會話  ini_set('session.gc_probability',1);  ini_set('session.gc_divisor',50);  ini_set('session.use_cookies',1);  //session的壽命  //ini_set('session.gc_maxlifetime',$_ENV['SYS']['Memtim']);  //ini_set('session.cookie_lifetime',$_ENV['SYS']['Memtim']);  //ini_set('session.save_handler','files');  //ini_set('session.save_path',Run.'_tmp');  //ini_set('session.save_handler','memcache');  //ini_set('session.save_path','tcp://127.0.0.1:11211');    //$_ENV['S_tim'] = ini_get('session.gc_maxlifetime');  //建立memcache對象  $_ENV['S_mem']=new Memcache;  $_ENV['S_mem']->connect($_ENV['SYS']['Memip'],$_ENV['SYS']['Mempt']) or die('Memcache連接失敗!');    return TRUE;  }  /**    讀取    返回:讀到的內容  /**/  public static function read($id){    return $_ENV['S_mem']->get('s_'.$id);  }  /**    寫入    返回:bool  /**/  public static function write($id,$data){    return $_ENV['S_mem']->set('s_'.$id,$data,MEMCACHE_COMPRESSED,$_ENV['SYS']['Memtim']);  }  /**    關閉    返回:bool  /**/  public static function close(){    $_ENV['S_mem']->close();    unset($_ENV['S_mem'],$_ENV['SYS']['Memtim']);    return TRUE;  }  /**    刪除    返回:bool  /**/  public static function destroy($id){    return $_ENV['S_mem']->delete('s_'.$id);  }  /**    清理    返回:bool  /**/  public static function gc(){    return TRUE;  }}session_set_save_handler('S::open','S::close','S::read','S::write','S::destroy','S::gc');$_ENV['sessionid']=(isset($_REQUEST['sessionid'])) ? trim($_REQUEST["sessionid"]) : session_id();if($_ENV['sessionid']!=''){session_id($_ENV['sessionid']);}session_start();